recognition rate and recognition accuracy of license plate recognition system < / a >

Whether a license plate recognition system is practical or not, the very important index is the recognition rate and recognition accuracy. According to the definitions in GA / t497-2004 and GA / t497-2009:

Recognition rate = number of vehicles whose license plate is automatically recognized / total number of vehicles whose license plate information is valid

Recognition accuracy = number of vehicles with correct license plate information / total number of vehicles with valid license plate information